^ This spacer is designed to fix the MAF sensor mount on the original open AFE intake.
The one you have posted is the newer sealed AFE intake design. There are some complaints that the sealed intake also has MAF issues, but I don't know that the same spacer will fix the sealed AFE design
http://www.e90post.com/forums/showth...e+engine+light
The sealed intake has proven to have good power gains but personally I would try to avoid AFE with their track record on N52 engines. I would think a eurobox with a K&N round filter will give you the same gains (although I haven't seen a dyno) without risk of MAF issues. Only problem is Eurbox is quiet. AFE for all their problems at least has awesome sound.